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IDE Problems

 
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Alan T Kelly
Advisor

IDE Problems

Hello all,
I have a ml330 g3 with two 40gig IDE drives setup in a Raid 1 config. The system uses the csb-6 raid controller to do so.

recently while analyzing system performance I discovered that my primary IDE controller is using DMA mode 2

I am certain that this shouldnt be the case - (should it not be using UDMA5) but have had no success in remedying the problem.

i have downloaded and installed all the latest Support Pack (psp-7.80.w2k3) but to no avail. I have downloaded BUT NOT USED the latest Proliant Firmware maintenance CD. (reason being im afriad that if there is some underlying problem i might exacerbate it??)

I have searched extensively but found no answer to how i should proceed to find the cause of, and remedy the problem?

attached is a pic of my setup and driver details.

any help greatly appreciated.
Alan



17 REPLIES 17
Andrew Young_2
Honored Contributor

Re: IDE Problems

Hi.

You primary IDE controller is probably connected to your CD ROM drive which why the bus speed downgraded to DMA mode 2. However you IDE drives themselves should be one a seperate bus so it shouldn't be a problem.

Regards

Andrew Y
Si hoc legere scis, nimis eruditionis habes
Alan T Kelly
Advisor

Re: IDE Problems

Hi Andrew,

and thanks for the speedy reply.

I just had a look inside and can confirm that the cabling IS setup exactly as per the server guidelines(see pic attached)excluding the third and fourth drives.

so any other ideas?
Al


Alan T Kelly
Advisor

Re: IDE Problems

also,

please see attached for the full situation
Andrew Young_2
Honored Contributor
Solution

Re: IDE Problems

Hi Alan

Those connectors are for the LSI IDE RAID controller. The Primary IDE connector is the connector above the two shown in the diagram and you should find the CD ROM is connected into that.

What is the bus speed of the Dual Channel PCI IDE controller, as that is the one the disks should be connected to.

Regards

Andrew Y
Si hoc legere scis, nimis eruditionis habes
Alan T Kelly
Advisor

Re: IDE Problems

Andrew,

could you explain what you mean by the "bus speed Dual Channel PCI IDE controller"

how do i find it?

Alan T Kelly
Advisor

Re: IDE Problems

Andrew,

could you explain what you mean by the "bus speed of the Dual Channel PCI IDE controller"

how do i find it?

Andrew Young_2
Honored Contributor

Re: IDE Problems

Hi

Sorry for the confusion I meant tranfer mode. The different DMA modes work at different transfwer rates amongst other things. The DMA mode will always revert back to that of the slowest device on that controller, the understanding being that all newer devices are backwards compatible and will adjust themselves downwards.

Regards

Andrew Y
Si hoc legere scis, nimis eruditionis habes
Alan T Kelly
Advisor

Re: IDE Problems

Andrew,

neither the
Dual Channel PCI IDE controller
or the
CSB-6 ultra ata...

show any DMA mode

see attached
Andrew Young_2
Honored Contributor

Re: IDE Problems

Hi Alan

At this stage I am out of ideas. However I'm 100 percent sure that your original concern that the DMA mode 2 was affecting your hard drive performance is not the case as they are on different controller paths.

I'm not sure if there is anyone else who can help you find the true DMA mode of those HDD's though. Unfortunately Windows is not my specialisation.

Regards

Andrew Y

Si hoc legere scis, nimis eruditionis habes